. >> reporter: tomorrow, clinton will introduce the man nominated to replace her, john kerry, so, today is likely the last long look the american public will have of hillary clinton for awhile. and, diane, there is no doubt she has left a vivid impression. >> it was memorable. thank you so much, martha raddatz. >>> and, also in washington, we want to tell you, there was a bit of an exhale today. back from the brink of another looming crisis, this time on the debt ceiling. republicans in the house changed course. and they voted for a plan that will allow the country to pay its bills, all the way through the middle of may. but they added a twist. members of congress have to pass a budget or their paychecks will be withheld. democrats are expected to go along. and today, the market soared. the dow ending at another five-year high, now back where it was before the recession started in december 2007. >>> and next, the latest today on that powerful blast of polar air sitting on top of a third of the country, creating an icebox. and here's the map tonight. bone-chilling weather from the dakota